11227603521 has 4 divisors (see below), whose sum is σ = 14970138032. Its totient is φ = 7485069012.

The previous prime is 11227603493. The next prime is 11227603589. The reversal of 11227603521 is 12530672211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 11227603521 - 2¹⁷ = 11227472449 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11227603421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1871267251 + ... + 1871267256.

It is an arithmetic number, because the mean of its divisors is an integer number (3742534508).

Almost surely, 2^11227603521 is an apocalyptic number.

It is an amenable number.

11227603521 is a deficient number, since it is larger than the sum of its proper divisors (3742534511).

11227603521 is an equidigital number, since it uses as much as digits as its factorization.

11227603521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3742534510.

The product of its (nonzero) digits is 5040, while the sum is 30.

The spelling of 11227603521 in words is "eleven billion, two hundred twenty-seven million, six hundred three thousand, five hundred twenty-one".